reduction; modified Poincaré differential equation; Birkhoff matrix form
In this paper the reduction of the modified Poincaré linear differential equation with one $n$-tuple regular singularity to the Birkhoff canonical matrix form is given.
 Risteski, I. B.: A Simple Reduction of the Poincaré Differential Equation to Cauchy Matrix Form
. Missouri J. Math. Sci. 11 (1999), 4–9. MR 1674447
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